100% Authentic ROLEX Oysterflex Black Rubber Strap | 20mm & 21mm

Upgrade your ROLEX with the genuine Oysterflex system—the industry-leading fusion of high-performance elastomer and a flexible metal core. This strap provides the rugged durability of rubber with the structural stability of a metal bracelet, featuring ROLEX’s patented internal cushions for maximum comfort and airflow.


Sizing & Fitment Guide

Rolex uses a letter-coded system for a precision fit. Use the table below to find the combination that matches your wrist circumference.

Strap CombinationPart LengthsWrist Circumference (cm)Wrist Circumference (in)
D + D50mm + 50mm13.5 – 14 cm5.31" – 5.51"
E + E55mm + 55mm14.5 – 15 cm5.71" – 5.91"
E + F55mm + 60mm15.5 – 16 cm6.10" – 6.30"
F + F60mm + 60mm16.5 – 17.5 cm6.50" – 6.89"
F + G60mm + 75mm18.0 – 19 cm7.09" – 7.48"
G + G75mm + 75mm19.5 cm +7.68" +

Lug Width Compatibility Chart:

Please ensure you select the correct width (20mm or 21mm) based on your specific Rolex model:

Lug WidthSupported Rolex Models
20mmDaytona (40mm), Yacht-Master (40mm), Submariner (40mm / Pre-2020), GMT-Master II, Explorer (39mm), Sea-Dweller (40mm), Milgauss
21mmSubmariner (41mm / 2020+), Datejust 41, Yacht-Master 42, Sky-Dweller, Explorer II (42mm), Sea-Dweller (43mm)
*Unsure about the size you need? Please contact us before purchasing! We are happy to help!

🔧 Hassle-Free Installation Kit Included

To ensure you can enjoy your new strap immediately, every order is supplied with a professional installation tool and precision screwdriver.


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